# A324768 (b-file synthesized from sequence entry) 1 1 2 1 3 2 4 3 5 6 6 11 7 27 8 60 9 152 10 376 11 968 12 2492 13 6549 14 17259 15 46000 16 123214 17 332304 18 900406 19 2451999 20 6703925